在ASP中的静态字段中使用Server.MapPath()。NET MVC

I'm building an ASP.NET MVC site where I'm using Lucene.Net for search queries. I asked a question here about how to properly structure Lucene.Net usage in an ASP.NET MVC application and was told that the best method is to declare the my IndexWriter as public static, so that it can be re-used.

我建立一个ASP。使用Lucene的MVC网站。网络搜索查询。我在这里问了一个关于如何正确构造Lucene的问题。Net在ASP中的使用。NET MVC应用程序，并被告知最好的方法是将我的IndexWriter声明为public static，这样它就可以被重用。

Here is some code that is at the top of my SearchController:

下面是我的SearchController顶部的一些代码:

public static string IndexLocation = Server.MapPath("~/lucene");
public static Lucene.Net.Analysis.Standard.StandardAnalyzer analyzer = new Lucene.Net.Analysis.Standard.StandardAnalyzer();
public static IndexWriter writer = new IndexWriter(IndexLocation,analyzer);

As writer is static, IndexLocation must also be static. Thus, the compiler is giving me the following error for Server.MapPath():

由于writer是静态的，IndexLocation也必须是静态的。因此，编译器给了我以下服务器. mappath()的错误:

An object reference is required for the non-static field, method, or property 'System.Web.Mvc.Controller.Server.get'

非静态字段、方法或属性的System.Web.Mvc.Controller.Server.get需要对象引用。

Is there a way of using Server.MapPath() or something similar from a static field? How can I fix this error?

是否有使用Server.MapPath()或类似于静态字段的方法?我如何修正这个错误?

2 个解决方案

#1

209

Try HostingEnvironment.MapPath, which is static.

HostingEnvironment试试。MapPath,是静态的。

See this SO question for confirmation that HostingEnvironment.MapPath returns the same value as Server.MapPath: What is the difference between Server.MapPath and HostingEnvironment.MapPath?

请参见这个SO问题，以确认HostingEnvironment。MapPath返回与服务器相同的值。MapPath:服务器之间的区别是什么?MapPath HostingEnvironment.MapPath ?

#2

I think you can try this for calling in from a class

我想你可以试着从课堂上打电话进来

 System.Web.HttpContext.Current.Server.MapPath("~/SignatureImages/");

*----------------Sorry I oversight, for static function already answered the question by adrift*

*---------------- ---------------- ---------------- -------------

System.Web.Hosting.HostingEnvironment.MapPath("~/SignatureImages/");

Update

更新

I got exception while using System.Web.Hosting.HostingEnvironment.MapPath("~/SignatureImages/");

使用system . web . host.hostingenvironment . mappath(“~/SignatureImages/”)时出现异常;

Ex details : System.ArgumentException: The relative virtual path 'SignatureImages' is not allowed here. at System.Web.VirtualPath.FailIfRelativePath()

交货的细节:系统。ArgumentException:此处不允许使用相对虚拟路径“SignatureImages”。在System.Web.VirtualPath.FailIfRelativePath()

Solution (tested in static webmethod)

解决方案(在静态webmethod中测试)

System.Web.HttpContext.Current.Server.MapPath("~/SignatureImages/"); Worked

System.Web.HttpContext.Current.Server.MapPath(~ / SignatureImages / ");工作

#1

209